std::alignment_of
From cppreference.com
Defined in header
<type_traits>
|
||
template< class T >
struct alignment_of; |
(since C++11) | |
Provides the member constant value
equal to the alignment requirement of the type T
, as if obtained by an alignof expression. If T
is an array type, returns the alignment requirements of the element type. If T
is a reference type, returns the alignment requirements of the type referred to.
Contents |
Inherited from std::integral_constant
Member constants
value
[static]
|
alignof(T) (public static member constant) |
Member functions
operator std::size_t |
converts the object to std::size_t, returns value (public member function) |
operator()
(C++14)
|
returns value (public member function) |
Member types
Type | Definition |
value_type
|
std::size_t
|
type
|
std::integral_constant<std::size_t, value> |
[edit] Possible implementation
template< class T > struct alignment_of : std::integral_constant< std::size_t, alignof(T) > {}; |
[edit] Notes
This type trait predates the alignof keyword, which can be used to obtain the same value with less verbosity.
[edit] Example
Run this code
Output:
1 4 8
[edit] See also
alignof operator | queries alignment requirements of a type (since C++11) |
(C++11)
|
defines the type suitable for use as uninitialized storage for types of given size (class template) |
(C++11)
|
defines the type suitable for use as uninitialized storage for all given types (class template) |
(C++11)
|
POD type with alignment requirement as great as any other scalar type (typedef) |
(library fundamentals TS)
|
variable template alias of std::alignment_of::value (variable template) |